改进型激光三角测头设计

设计了一种改进型激光三角测头, 在传统直射式激光三角测距方法的基础上, 提出了一种新型单透镜设计理念。以普通直射式激光三角法为基础, 对该光路进行改进, 在光学系统中使用一个分束镜来取代传统激光三角测头的聚焦透镜和成像透镜, 令其与聚光透镜和光电探测器共轴, 使系统的结构更加紧凑, 并推导了满足该结构的Scheimpflug条件。同时利用Zemax光学设计软件仿真光学系统, 系统入瞳直径4 mm, 焦距20 mm, 总长20.5 mm, 满足测量系统的小型化。当与合适的光源和探测器配合使用时, 能够在保证较高测量精度的前提下获得更大的工作范围, 提高测量系统的环境适应性, 可广泛应用于工业实时在线检测以及**领域。

Abstract

An improved laser triangulation probe was designed based on the traditional direct laser triangulation method. A new single lens design was proposed based on general direct laser triangulation ranging method. The optical path was improved. In optical systems, a beam splitter was used to replace the focusing lens and imaging lens of traditional laser triangular probe, making it coaxial with concentrator lens and photo detector, which made the system structure more compact, and the Scheimpflug condition was deduced to meet the structure. While taking advantage of Zemax optical design software to simulate the optical system, pupil diameter of 4 mm, focal length of 20 mm, total length of 20.5 mm, can achieve miniaturization of measuring system. Together with the appropriate light source and detector, a larger scope of work can be obtained in ensuring high measurement accuracy of the premise, and improving the environmental adaptability of measurement system. It can be widely used in industrial real time online testing and military fields.

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张欣婷, 亢磊, 安志勇, 王若帆. 改进型激光三角测头设计[J]. 红外与激光工程, 2018, 47(10): 1018002. Zhang Xinting, Kang Lei, An Zhiyong, Wang Ruofan. Improved laser triangulation probe design[J]. Infrared and Laser Engineering, 2018, 47(10): 1018002.

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